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Superior dislocation of the patella: a case report.

Cusco X, Seijas R, Ares O, Cugat JR, Garcia-Balletbo M, Cugat R - J Orthop Surg Res (2009)

Bottom Line: Superior dislocation of the patella is an uncommon condition that mainly occurs in knees with a high patella and medial femorotibial degenerative arthritis.To avert additional recurrence or new dislocations, the patient was treated surgically to remove the existing osteophytes.An arthroscopic approach was decided because of the lower associated morbidity and good results with this technique compared to open surgery.

View Article: PubMed Central - HTML - PubMed

Affiliation: Orthopedic and Trauma Surgery, Fundación García Cugat Hospital Quiron Barcelona - Spain. roberto6jas@gmail.com.

ABSTRACT

Background: Superior dislocation of the patella is an uncommon condition that mainly occurs in knees with a high patella and medial femorotibial degenerative arthritis. There are no previous reports of this condition occurring in association with tibial valgus osteotomy.

Case report: We report the case of a patient in whom vertical dislocation recurred twice at 4 months after tibial valgus osteotomy. To avert additional recurrence or new dislocations, the patient was treated surgically to remove the existing osteophytes.

Conclusions: An arthroscopic approach was decided because of the lower associated morbidity and good results with this technique compared to open surgery.

No MeSH data available.


Related in: MedlinePlus

Lateral radiograph showing the kneecap in superior dislocation with blocking in the osteophytosis of the inferior patellar pole and femoral osteophyte.
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Figure 1: Lateral radiograph showing the kneecap in superior dislocation with blocking in the osteophytosis of the inferior patellar pole and femoral osteophyte.

Mentions: Four months later, she came to the emergency room after a sudden movement involving hyperextension, which resulted in pain and an inability to move the operated knee. Radiographs showed superior dislocation of the patella (figure 1), which was manipulated to obtain immediate orthopaedic reduction without the need for anesthesia. After reduction (figure 2), the patient experienced complete pain relief and restoration of joint mobility. Seventy-two hours later, she had another dislocation with self-reduction. Arthroscopic femoropatellar examination was then decided. The procedure, carried out 8 days later, revealed the presence of femoropatellar osteophytes in the area of the dislocation, which were completely removed. The patient progressed satisfactorily and had no new episodes of dislocation or knee problems over a follow-up of 2 years.


Superior dislocation of the patella: a case report.

Cusco X, Seijas R, Ares O, Cugat JR, Garcia-Balletbo M, Cugat R - J Orthop Surg Res (2009)

Lateral radiograph showing the kneecap in superior dislocation with blocking in the osteophytosis of the inferior patellar pole and femoral osteophyte.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2724434&req=5

Figure 1: Lateral radiograph showing the kneecap in superior dislocation with blocking in the osteophytosis of the inferior patellar pole and femoral osteophyte.
Mentions: Four months later, she came to the emergency room after a sudden movement involving hyperextension, which resulted in pain and an inability to move the operated knee. Radiographs showed superior dislocation of the patella (figure 1), which was manipulated to obtain immediate orthopaedic reduction without the need for anesthesia. After reduction (figure 2), the patient experienced complete pain relief and restoration of joint mobility. Seventy-two hours later, she had another dislocation with self-reduction. Arthroscopic femoropatellar examination was then decided. The procedure, carried out 8 days later, revealed the presence of femoropatellar osteophytes in the area of the dislocation, which were completely removed. The patient progressed satisfactorily and had no new episodes of dislocation or knee problems over a follow-up of 2 years.

Bottom Line: Superior dislocation of the patella is an uncommon condition that mainly occurs in knees with a high patella and medial femorotibial degenerative arthritis.To avert additional recurrence or new dislocations, the patient was treated surgically to remove the existing osteophytes.An arthroscopic approach was decided because of the lower associated morbidity and good results with this technique compared to open surgery.

View Article: PubMed Central - HTML - PubMed

Affiliation: Orthopedic and Trauma Surgery, Fundación García Cugat Hospital Quiron Barcelona - Spain. roberto6jas@gmail.com.

ABSTRACT

Background: Superior dislocation of the patella is an uncommon condition that mainly occurs in knees with a high patella and medial femorotibial degenerative arthritis. There are no previous reports of this condition occurring in association with tibial valgus osteotomy.

Case report: We report the case of a patient in whom vertical dislocation recurred twice at 4 months after tibial valgus osteotomy. To avert additional recurrence or new dislocations, the patient was treated surgically to remove the existing osteophytes.

Conclusions: An arthroscopic approach was decided because of the lower associated morbidity and good results with this technique compared to open surgery.

No MeSH data available.


Related in: MedlinePlus